LEINEREI review for Smile: Loyalty Program Rewards

It would be nice if the app would collect the customers birthday including birthyear, so shop owners know how old their customers are. It makes sense to collect this data within the loyalty program as people will only give this information for incentives like points or gifts. So please add this feature soon! It could be up the shop owner to set this as optional or mandatory field. Other than this the app is really good and working very well. Would definitely recommend!